\documentclass{standalone}
\usepackage{tikz}
\usepackage{ctex,siunitx}
\setCJKmainfont{Noto Serif CJK SC}
\usepackage{tkz-euclide}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{circuitikz}
\usetikzlibrary{patterns, calc}
\usetikzlibrary {decorations.pathmorphing, decorations.pathreplacing, decorations.shapes,}
\ctikzset{bipoles/length=1cm}
\begin{document}
\small
\begin{circuitikz}[>=latex, scale=0.8,european]
  % \useasboundingbox(0.9,0)rectangle(5.1,5);
  \draw (0,0)--node [below]{$r$} (3,0)--node[below]{$r$}(5,0) to [R=$R_2$] (5,3)--node[above]{$r$}(3,3) --node[above]{$r$}(0,3);
  \draw (3,0) to [R=$R_1$, *-*] (3,3);
  \draw [<->](0,0.1)--(0,3-.1)node [midway,left]{\qty{220}{V}} ;
  \draw [fill=white](0,0) circle (2pt);
  \draw [fill=white](0,3) circle (2pt);
\end{circuitikz}
\end{document}